Weld metal



. bronzes, cast iron,'and steel.

Donald K. Crampton,

" on, and Henry L.

Burghofi, Waterbury, C., assignors to Chase Brass & Copper Co. incorporated, Waterbury,

Court, a corporation No Drawing. Application July 31, 1940, Serial No. 349,020

4 Claims.

This invention relates to improvements in weld metal for use in arc welding.

This application is a continuation-in-part of our application Serial No. 269,780, filed April 24, 1939.

One object of this invention is to provide an improved weld metal for use in arc welding.

Other objects of this invention will appear from the present disclosure.

We have invented a new weld metal particularly suitable for arc welding base metal of either tough-pitch copper or deoxidized copper. The welding process can be carried out by means of a carbon rod forming the arc and our improved alloy in rod'or other form being melted by the heat of the arc to form the filler metal of the welded joint, or our improved weld metal can be in the form of a metal rod which is used both to form the arc and supply the welding or filler metal.

Our improved weld metal or welding alloy contains nickel from about to about 10%, phosphorus from about 95 to about tin in any amount up to about 2% although preferably from about /4% to about 2%, and the balance substantially of copper, although the tin can be omitted. Tin is preferably present, however, as it gives the alloy increased strength, increased fluidity, and increased wetting power. Expressions such as the balance or remainder substantially of copper, etc., are intended to include such one or more additional elements in such substantially innocuous amounts as do not seriously impair the desired properties of the alloy, that is, in such amounts as do not essentially change the nature of the alloy.

A more preferred range is to have the nickel from about 1% to about 5%, the phosphorus from about 0.1% to about A%, the tin from about to 1 and the balance substantially of copper.

A still more preferred alloy is to have nickel about 2%, phosphorus about tin about 1%, and the balance substantially of copper.

Alloys made in accordance with the present invention have been found particularly well suited Another efiect, possibly connected indirectly bead of weld metal is noticeably lower and Another advantage of the new welding rods is that they can be used bare for metal arc welding. This is most unusual, as with other metal arc welding rods it is necessary to useia heavy nonmetallic mineral coating to stabilize the are, as otherwise the arc would bevery wild, and excessive spattering and unsoundness and cold shuts would result. With our improved alloys used bare, a surprisingly steady arc can be held. If desired, however, our alloys can be used with a suitable coating and for certain uses their effectiveness possibly increasedthereby. Such a coating could be, for example, a mixture of borax, boric acid, sodium carbonate, a chloride such as salt, and a binder such as waterglass or lacquer.

The invention may, be carried out in other specific ways than those herein set forth without departing from the spirit and essential characteristics of the invention, and the present embodiments are, therefore, to be considered inall respects as illustrative and not restrictive, and all changes coming within the meaning and equivalency range of the appended claims are intended to be embraced therein.

We claim:

1. A welding rod for fusion-type welding, characterized by-high fluidity and high wetting power in the molten state, and formed from an alloy consistingof: nickel from about /2% to about 10%; phosphorus from about %d% to about l/ tin, if any, up to about 2%; and the balance substantially of copper. V

2. A welding rod for fusion-type welding, characterized by high fluidity and high wetting power in the molten state, and formed from an alloy consisting of: nickel from about to about 10%; phosphorus from about to about /2%; tin from about $4 to about 2% and the balance substantially of copper.

3. A welding rod for fusion-type welding, characterized by high fluidityand high wetting power in the molten state, and formed from an alloy consisting of: nickel from about 1% to about 5%;

phosphorus 

